Author: Dann Corbit
Date: 15:53:35 03/07/00
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On March 07, 2000 at 18:30:42, Robert Hyatt wrote: >On March 07, 2000 at 15:21:19, Dann Corbit wrote: > >>On March 07, 2000 at 15:04:26, Dikmen wrote: >> >>>Hello everybody >>> >>>I have a 8 cpu server at work.I want to test Deep Junior and Crafty on it. >>> >>>But I have a question.Can anybody tell how many cpus does this prgrams support. >>> >>>Does they work under 8 cpus or they are limited to 4 cpus? >> >>Don't know for sure about Deep Junior, but crafty needs to be compiled for 8 >>CPU's or more. The CraftySMP at my ftp site is compiled for up to 256 CPU's > >Not exactly, unless you changed MAX_BLOCKS in chess.h. This algorithm requires >at _least_ one split block per cpu. For 4 cpus, I use 64 for MAX_BLOCKS. I >would suggest at least 1024 for 256 cpus and that is probably low. The problem >is that a block gets used to split the tree, and copied to clone blocks for >each thread. And this happens recursively, which means many such blocks are >needed. With CPUS> 64 there is no way to get them busy as no split blocks will >be available.. How about: ... #define EGTB_CACHE_DEFAULT (1024*1024) #define MAXPLY 65 #if defined (SMP) #define MAX_BLOCKS 4096 #else #define MAX_BLOCKS 64 #endif #define MAX_TC_NODES 300000 ...
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